ISO 11515:2022
Gas cylinders — Refillable composite reinforced tubes of water capacity between 450 l and 3000 l — Design, construction and testing
This document specifies the minimum requirements for the materials, design, construction and performance testing of
— Type 2 hoop-wrapped composite tubes,
— Type 3 fully-wrapped composite tubes, and
— Type 4 fully-wrapped composite tubes
with water capacities between 450 l and 3 000 l for storage and conveyance of compressed or liquefied gases with test pressures up to and including 1 600 bar[1] and a design life of at least 15 years.
This document is applicable to expected service temperatures between −40 °C and +65 °C.
NOTE Type 4 tubes manufactured and tested to this document are not intended to contain toxic, oxidizing or corrosive gases.
This document is applicable to tubes with composite reinforcement of carbon fibre or aramid fibre or glass fibre (or a mixture thereof) in a matrix.
[1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 Liner materials
6.2 Composite overwrap
7 Design and manufacture
7.1 General
7.2 Design submission
7.3 Manufacturing
8 Type approval procedure
8.1 General
8.2 Prototype tests
8.3 New design
8.4 Design variants
8.5 Type approval test procedures and criteria
8.5.1 General
8.5.2 Hydraulic proof pressure test
8.5.3 Hydraulic volumetric expansion test
8.5.4 Liner burst test
8.5.5 Tube burst test
8.5.6 Ambient cycle test
8.5.7 Environmental cycle test
8.5.8 Flaw test
8.5.9 Blunt impact test
8.5.10 Fire resistance test
8.5.11 Neck strength test
8.5.12 Leak test
8.5.13 Accelerated stress rupture test
8.5.14 Permeability test
8.5.15 Gas cycle test
8.5.16 Coatings test
8.5.17 Salt spray test
8.5.18 Acid environment test
8.5.19 Vacuum test
8.5.20 High velocity impact (gunfire) test
8.5.21 Glass transition temperature test
8.5.22 Resin shear strength test
8.6 Failure of type approval tests
9 Inspection and testing at time of manufacture
9.1 Liners for Type 2 and Type 3 tubes
9.2 Failure of load-sharing liner batch tests
9.3 Liners for Type 4 tubes
9.4 Failure of non-load sharing liner batch tests
9.5 Overwrap materials
9.6 Composite tube
9.7 Failure of batch tests
10 Tube marking
10.1 General
10.2 Additional marking
Annex A (informative) Example of a design approval certificate
Annex B (informative) Example of a test report
Annex C (normative) Ultrasonic inspection for seamless steel liners and metal tubing
Annex D (informative) Guidance for calculating permeation rates when using trace gases
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Inspection and testing
6 Materials
6.1 Liner materials
6.2 Composite overwrap
7 Design and manufacture
7.1 General
7.2 Design submission
7.3 Manufacturing
8 Type approval procedure
8.1 General
8.2 Prototype tests
8.3 New design
8.4 Design variants
8.5 Type approval test procedures and criteria
8.5.1 General
8.5.2 Hydraulic proof pressure test
8.5.3 Hydraulic volumetric expansion test
8.5.4 Liner burst test
8.5.5 Tube burst test
8.5.6 Ambient cycle test
8.5.7 Environmental cycle test
8.5.8 Flaw test
8.5.9 Blunt impact test
8.5.10 Fire resistance test
8.5.11 Neck strength test
8.5.12 Leak test
8.5.13 Accelerated stress rupture test
8.5.14 Permeability test
8.5.15 Gas cycle test
8.5.16 Coatings test
8.5.17 Salt spray test
8.5.18 Acid environment test
8.5.19 Vacuum test
8.5.20 High velocity impact (gunfire) test
8.5.21 Glass transition temperature test
8.5.22 Resin shear strength test
8.6 Failure of type approval tests
9 Inspection and testing at time of manufacture
9.1 Liners for Type 2 and Type 3 tubes
9.2 Failure of load-sharing liner batch tests
9.3 Liners for Type 4 tubes
9.4 Failure of non-load sharing liner batch tests
9.5 Overwrap materials
9.6 Composite tube
9.7 Failure of batch tests
10 Tube marking
10.1 General
10.2 Additional marking
Annex A (informative) Example of a design approval certificate
Annex B (informative) Example of a test report
Annex C (normative) Ultrasonic inspection for seamless steel liners and metal tubing
Annex D (informative) Guidance for calculating permeation rates when using trace gases
Bibliography